KR20060073328A - Plasma display panel and making method thereof - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel. The present invention relates to a plasma display panel and a method of manufacturing the same. It is about.

The plasma display panel according to the present invention includes a front panel formed by arranging scan electrodes and a sustain electrode on the front glass, a rear panel formed by arranging address electrodes crossing the scan electrode and the sustain electrode on the rear glass, and the front panel. A partition wall for partitioning a discharge cell between rear panels, the scan electrode and the sustain electrode are formed of a transparent electrode and a bus electrode, and a black layer is formed in a non-discharge area of the front glass corresponding to the upper part of the partition wall, The transparent electrode may include a transparent electrode for discharge formed in the discharge region of the front glass and a transparent electrode for adhesion formed in the non-discharge region of the front glass corresponding to an upper portion of the partition wall.

In addition, the manufacturing method of the plasma display panel according to the present invention includes a front panel formed by arranging scan electrodes and a sustain electrode on the front glass, a rear panel formed by arranging address electrodes crossing the scan electrode and the sustain electrode on the rear glass, In the method of manufacturing a plasma display panel including a partition wall for partitioning a discharge cell between the front panel and the rear panel, forming the front panel comprises the steps of applying a transparent electrode paste on the glass, the transparent electrode Disposing a predetermined mask having either a dot pattern or a line pattern on the upper surface; forming a predetermined transparent electrode pattern by irradiating a predetermined amount of light on the predetermined mask; and forming an upper portion of the transparent electrode pattern Applying a black face to form a black layer It is characterized by comprising.

Plasma Display Panel, Front Glass, Transparent Electrode, Adhesive, Black Layer

Description

Plasma Display Panel and Making Method

1 is a structural diagram of a typical plasma display panel;

2 is a front panel manufacturing process diagram of a conventional plasma display panel;

3 illustrates a mask pattern used in manufacturing a front panel of a conventional plasma display panel;

4 is a structural diagram of a plasma display panel front panel according to the present invention;

5 is a flowchart sequentially illustrating a method of manufacturing a plasma display panel according to the present invention;

6 is a front panel manufacturing process diagram of a plasma display panel according to the present invention;

7 and 8 illustrate mask patterns used in manufacturing a front panel of a plasma display panel according to the present invention.

***** Explanation of symbols for the main parts of the drawing *****

201: front glass 202a, 203a: transparent electrode

202b and 203b Bus electrode 204 Dielectric layer

205: black layer 206: protective layer

207: transparent electrode for adhesion

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel and a method for manufacturing the same, which improves the adhesive force between the black layer formed on the front glass and the front glass, thereby reducing the defects. .

In general, a plasma display panel is a partition wall formed between a front substrate and a rear substrate to form a unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He) and An inert gas containing the same main discharge gas and a small amount of xenon is filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light configuration.

1 illustrates a structure of a general plasma display panel.

As shown in FIG. 1, a plasma display panel includes a front substrate in which a plurality of sustain electrode pairs formed by pairing a scan electrode 102 and a sustain electrode 103 are formed on a front glass 101, which is a display surface on which an image is displayed. The rear substrate 110 having the plurality of address electrodes 113 arranged to intersect the plurality of sustain electrode pairs on the back glass 111 forming the back surface 100 and the rear surface is coupled in parallel with a predetermined distance therebetween. .                         

The front substrate 100 is made of a scan electrode 102 and a sustain electrode 103, that is, a transparent electrode (a) formed of a transparent ITO material and a metal material to mutually discharge and maintain light emission of the cells in one discharge cell. The scan electrode 102 and the sustain electrode 103 provided as the bus electrode b are included in pairs. The scan electrode 102 and the sustain electrode 103 are covered by one or more upper dielectric layers 104 that limit the discharge current and insulate the electrode pairs, and to facilitate the discharge conditions on the upper dielectric layer 104 top surface. A protective layer 105 on which magnesium oxide (MgO) is deposited is formed.

The rear substrate 110 is arranged in such a manner that a plurality of discharge spaces, that is, barrier ribs 112 of a stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 113 which perform address discharge to generate vacuum ultraviolet rays are arranged in parallel with the partition wall 112. On the upper side of the rear substrate 110, R, G, and B phosphors 114 which emit visible light for image display during address discharge are coated. A lower dielectric layer 115 is formed between the address electrode 113 and the phosphor 114 to protect the address electrode 113.

The conventional plasma display panel having such a structure is largely formed through a glass substrate manufacturing process, a front panel manufacturing process, a rear panel manufacturing process, and an assembly process. In particular, the front panel manufacturing process of the plasma display panel manufacturing process is as follows.

2 is a process diagram sequentially illustrating a front panel manufacturing process of a conventional plasma display panel.                         

As shown in FIG. 2, in the step (a), an I-beam or sputtering method using ITO made of indium oxide and tin oxide on the front glass substrate 10 as the display surface on which the image is to be displayed is performed. After the deposition to a predetermined thickness to form the transparent electrodes (11a, 12a), the photoresist (A) is applied on the transparent electrodes (11a, 12a), the predetermined pattern as shown in Figure 3 The formed photo mask B is placed on the photoresist A and irradiated with light to cure the photoresist. This process is called an exposure process. After the exposure process, the front glass substrate is washed with the uncured photoresist through (b), that is, the developing process, sandblasted or etched the transparent electrode, and then the photoresist is removed in (c). Transparent electrodes 11a and 12a are formed at the scan electrode and the sustain electrode.

 Subsequently, in step (d), the black layer paste 20 is coated on the front glass substrate 10 including the transparent electrodes 11a and 12a, and then the photoresist is formed on the black layer paste 20. C) is applied to perform the exposure process as described above. The black glass 20 is formed by removing the photoresist in the front glass substrate which has undergone the exposure process through the developing process and the etching process as in step (e).

Thereafter, in step (f), the photosensitive silver (Ag) paste is printed on the black layer 20 by the screen-printing method, and then the bus line electrode is formed using the photolithography method as described above. (11b, 12b) are formed. Thereafter, the substrate is heated to a temperature of about 550 ° C. and fired to form a scan electrode and a sustain electrode.

Subsequently, in step (g), the dielectric glass paste is coated and dried on the front glass substrate on which the scan electrode, the sustain electrode, and the black layer 20 are formed, and then fired at a temperature of about 500 to 600 ° C. to form the dielectric layer. 30 is formed, and finally, a protective layer 40 made of magnesium oxide (MgO) is formed on the surface of the dielectric layer 30 by CVD, ion plating, vacuum deposition, or the like to form a front surface of the plasma display panel. Form a panel.

Meanwhile, as described above, silver (Ag), which is formed on the front glass and forms the bus electrode in the plasma display panel manufacturing process, does not transmit light due to discharge, and reflects external light to the transparent electrode and the bus electrode. A black layer is formed to improve contrast. However, the black layer formed on the front glass has a problem of reducing the yield of the plasma display panel by increasing the defect rate by causing the short-circuit and partial peeling of the black layer pattern due to poor adhesion with the glass.

Accordingly, an object of the present invention is to provide a plasma display panel and a method of manufacturing the same, which can improve production yield and minimize defect rate by improving adhesion between the black layer formed on the front panel of the plasma display panel and the front glass.

Technical means of the present invention for achieving the above object is a front panel formed by the scan electrode and the sustain electrode is arranged on the front glass, a rear panel formed by the address electrode crossing the scan electrode and the sustain electrode is arranged on the rear glass, In the plasma display panel including a partition wall for partitioning the discharge cells between the front panel and the rear panel, the scan electrode and the sustain electrode is composed of a transparent electrode and a bus electrode, the front glass corresponding to the upper portion of the partition wall The black layer is formed in the non-discharge region, and the transparent electrode includes a transparent electrode for discharge formed in the discharge region of the front glass and a transparent electrode for adhesion formed in the non-discharge region of the front glass corresponding to the upper part of the partition wall. It is done.

Here, the adhesive transparent electrode may be any one of a dot pattern or a line pattern or may have various other patterns, and the transparent electrode for discharge may be formed of a pattern having a hole having a predetermined shape.

In addition, the manufacturing method of the plasma display panel of the present invention for achieving the above object is a front panel formed by arranging a scan electrode and a sustain electrode on the front glass, an address electrode crossing the scan electrode and the sustain electrode is formed on the rear glass. In the method of manufacturing a plasma display panel including a rear panel arranged to form a partition for partitioning a discharge cell between the front panel and the rear panel, the process of forming the front panel is to apply a transparent electrode paste on the glass And disposing a predetermined mask having either a dot pattern or a line pattern on the transparent electrode, and irradiating a predetermined amount of light on the predetermined mask to form a predetermined transparent electrode pattern. And a black face is coated on the transparent electrode pattern. It characterized in that it comprises a step of forming a rack layer.

In addition, the dot pattern or line pattern is characterized in that arranged in the position where the black layer is formed.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

4 is a structural diagram of a plasma display panel front panel according to the present invention.

As shown in FIG. 4, the plasma display panel includes a plurality of sustain electrode pairs formed by pairing scan electrodes 202a and 202b and sustain electrodes 203a and 203b on the front glass 201, which is a display surface on which an image is displayed. The rear substrate 210 on which the plurality of address electrodes 211 are arranged so as to intersect with the plurality of storage electrode pairs described above is arranged on the rear substrate 210 formed on the rear substrate 210 with a predetermined distance therebetween. Combined in parallel.

The front substrate 201 is configured to scan electrodes 202a and 202b and sustain electrodes 203a and 203b, that is, transparent electrodes 202a and 203a, which are mutually discharged in one discharge cell and maintain light emission. And scan electrodes 202a and 202b and sustain electrodes 203a and 203b provided as bus electrodes 202b and 203b made of a metal material. Here, the transparent electrode is formed of the discharge transparent electrodes 202a and 203a formed in the discharge region and the black layer adhesive transparent electrode 207 formed in the non-discharge region, and the adhesive transparent electrode 207 is formed on the front glass. If the black layer 205 is formed, the bus electrodes 202b and 203b are provided on the black layer 205. The black layer 205 and the scan electrodes 202a and 202b and the sustain electrodes 203a and 203b are then covered by one or more upper dielectric layers 204 that limit the discharge current and insulate the electrode pairs, and the upper dielectric layer. On the upper surface, a protective layer 206 having magnesium oxide (MgO) deposited thereon is formed to facilitate discharge conditions.

The rear substrate 210 is arranged such that a plurality of discharge spaces, that is, barrier ribs 214 of stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 211 that perform address discharge to generate vacuum ultraviolet rays are disposed in parallel with the partition wall 214. On the upper side of the rear substrate 210, R, G, and B phosphors 215 for emitting visible light for image display during address discharge are coated. A lower dielectric layer 212 is formed between the address electrode 211 and the phosphor 215 to protect the address electrode 211.

A method of manufacturing a plasma display panel having such a structure will be described below with reference to FIG. 5.

5 is a flowchart sequentially illustrating a method of manufacturing a plasma display panel according to the present invention.

As shown in FIG. 5, the method of manufacturing a plasma display panel according to the present invention includes a front panel manufacturing process as listed on the right side of FIG. 5, a rear panel manufacturing process as listed on the left side, and a sealing process as listed below. Assembly process, including the like.

First, the front panel manufacturing process listed on the right side of FIG. 5 will be described. First, after preparing the front glass to be the base material of the front panel (100), a transparent electrode is formed on the front glass (110), and then, a black layer paste is coated on the front glass including the transparent electrode to the black A layer is formed (120). Thereafter, a bus electrode is formed on the black layer (130), and an upper dielectric layer is formed on the front glass including the transparent electrode, the black layer, and the bus electrode (140). Then, a protective layer made of Mgo for protecting the electrode on the upper dielectric layer is formed (150).

Next, the manufacturing process of the back panel of the plasma display panel will be described. First, a rear glass is prepared (200), and a plurality of address electrodes are formed on the rear glass so as to cross and face the sustain electrode pairs formed on the front panel (210). A lower dielectric layer is formed on the upper surface of the address electrode (220). In operation 230, a fluorescent layer is formed on an upper surface of the lower dielectric layer.

The front panel and the rear panel manufactured as described above are sealed to each other to form a plasma display panel 400.

Meanwhile, in the method of manufacturing the plasma display panel of the present invention manufactured as described above, the manufacturing process of the front panel will be described in more detail with reference to FIG. 6.

6 is a process diagram sequentially illustrating a front panel manufacturing process of a plasma display panel according to the present invention.

As shown in FIG. 6, in step (a), an I-beam or sputtering method of ITO made of indium oxide and tin oxide is formed on the upper surface of the front glass substrate 50, which is the display surface on which the image is to be displayed. It is deposited to a predetermined thickness to form transparent electrodes 51a and 52a, and photoresist A is coated on the transparent electrodes 51a and 52a. Subsequently, a photo mask (D) having a predetermined pattern as shown in FIG. 7 (a) or (b) is formed on the photoresist A so as to be spaced apart by a predetermined distance. An exposure step of curing the photoresist by irradiating with light is performed. After the exposure process, the front glass substrate is washed with the uncured photoresist through (b), that is, the developing process, sandblasted or etched the transparent electrode, and then the photoresist is removed in (c). Transparent electrodes 51a and 52a for discharging at the scan electrode and the sustain electrode are formed in the discharge region of the upper front glass 50, and a plurality of black layers are adhered to the non-discharge region of the front glass corresponding to the partition wall formed at the rear panel. The transparent electrode 70 is formed.

At this time, the adhesive transparent electrode 70 formed in the front glass non-discharge region is formed in a dot shape on the front glass 50 by a photo mask having a dot pattern as shown in FIG. Alternatively, the photomask is formed in a line shape on the front glass 50 by a photo mask having a line pattern as shown in FIG. 7B.

In addition, as shown in (a) or (b) of FIG. 8, the transparent transparent electrodes 51a and 52a formed in the front glass discharge region have a mask pattern in which the transparent transparent electrodes 51a and 52a are formed. By using a pattern having a predetermined shape, a predetermined groove is formed on the transparent electrode to increase the discharge efficiency. In this case, the grooves formed in the transparent transparent electrodes 51a and 52a for discharge may be formed not only by an exposure process using a mask pattern but also by a laser processing.

Subsequently, in step (d), the black layer paste 60 is formed on the front glass substrate 50 including the discharge region transparent electrodes 51a and 52a and the plurality of adhesive transparent electrodes 70 formed in the non-discharge region. After coating, the photoresist (E) is applied on the black layer paste 60 to perform the exposure process as described above. The black glass 60 is formed by removing the photoresist in the front glass substrate that has undergone the exposure process as in step (e) through a developing process and an etching process.

Subsequently, in step (f), the photosensitive silver (Ag) paste is printed on the black layer 60 by a screen-printing method, and then the bus line electrode is formed using the photolithography method as described above. (51b, 52b) are formed. Thereafter, the substrate is heated to a temperature of about 550 ° C. and fired to form a scan electrode and a sustain electrode.

Subsequently, in step (g), a dielectric glass paste is coated and dried on the front glass substrate on which the scan electrode, the sustain electrode and the black layer 60 are formed, and then fired at a temperature of about 500 to 600 ° C. 80), and finally, a protective layer 90 made of magnesium oxide (MgO) is formed on the surface of the dielectric layer 80 by CVD, ion plating, vacuum deposition, or the like to form a front panel of the plasma display panel. To form.

The black layer of the front substrate of the plasma display panel manufactured by the above process can achieve a uniform thickness by improved adhesion with the upper portion of the front glass, thereby improving contrast characteristics.

As described above, it will be understood by those skilled in the art that the technical configuration of the present invention may be implemented in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above, the present invention has an effect of minimizing defect rate and improving production yield by improving adhesion between the black layer formed on the front panel and the front glass during the manufacturing process of the plasma display panel.

Claims (5)

A front panel formed by arranging scan electrodes and a sustain electrode on the front glass, a rear panel formed by arranging address electrodes intersecting the scan electrode and the sustain electrode on a rear glass, and partitioning a discharge cell between the front panel and the rear panel. In the plasma display panel comprising a partition for, The scan electrode and the sustain electrode is composed of a transparent electrode and a bus electrode, The black layer is formed in the non-discharge region of the front glass corresponding to the upper part of the partition wall, The transparent electrode And a transparent electrode for discharge formed in the discharge region of the front glass and a transparent electrode for adhesion formed in the non-discharge region of the front glass corresponding to the upper portion of the partition wall. The method of claim 1, The adhesive transparent electrode has a pattern of any one of a dot pattern or a line pattern plasma display panel. The method of claim 1, And the transparent electrode for discharge is formed in a pattern having holes of a predetermined shape. A front panel formed by arranging scan electrodes and a sustain electrode on the front glass, a rear panel formed by arranging address electrodes intersecting the scan electrode and the sustain electrode on a rear glass, and partitioning a discharge cell between the front panel and the rear panel. In the manufacturing method of the plasma display panel comprising a partition for, Forming the front panel is (a) applying a transparent electrode paste on the glass; (b) disposing a predetermined mask including any one of a dot pattern and a line pattern on the transparent electrode; (c) irradiating a predetermined amount of light on the predetermined mask to form a predetermined transparent electrode pattern; And (d) coating a black face on the transparent electrode pattern to form a black layer Method of manufacturing a plasma display panel comprising a. The method of claim 4, wherein And the dot pattern or line pattern is disposed at a position where the black layer is formed.

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